US Patent 7651429 Multi-speed transmission

A transmission with planetary gearsets (RS1, RS2, RS3, RS4), shafts and shifting elements (A, B, C, D, E). A carrier of gearset (RS2) and the input forming shaft (1). A carrier of gearset (RS3) and the output forming shaft (2). Sun gears of gearsets (RS1, RS4) couple and forming shaft (3). Ring gears of gearsets (RS1, RS4) respectively form shafts (4, 8). Sun gears of gearsets (RS2, RS3) forming shaft (5). A carrier and a ring gear of respective gearsets (RS1, RS3) forming shaft (6). A ring gear and a carrier of respective gearsets (RS2 RS4) forming shaft (7). In the direction of power flow, element (A) is located between shaft (3) and a housing, element (B) between shaft (4) and the housing, element (C) between two of shafts (1, 5, 7), element (D) between shafts (6, 8), and element (E) between shafts (5, 8).